Abstract
A multilevel superelement technique is applied to model the effects of circular voids on the effective elastic properties of a porous material. A two-dimensional representative volume element with a circular void in its center is initially modeled by a superelement. A thin plate of porous material with a macrocircular hole in the center is constructed with this superelement. The finite element computation is then conducted to estimate the effective Young's modulus, Poisson's ratio, and the shear modulus of the material using the ABAQUS code for different void sizes. The values of the isotropic damage variables, DEand DG, under various degree of damage are hence determined. These values are compared with those calculated by using a conventional micromechanics damage model. A new isotropic damage model is proposed based on the results of this analysis. To demonstrate the applicability of this damage model, an example case of a notched cylindrical bar under tensile loading is investigated.
Original language | English |
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Pages (from-to) | 187-199 |
Number of pages | 13 |
Journal | International Journal of Damage Mechanics |
Volume | 13 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Apr 2004 |
Keywords
- A multilevel superelement
- Effective elastic properties
- Finite element simulation
- Isotropic damage
- Porous material
ASJC Scopus subject areas
- Computational Mechanics
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering